KR100808826B1 - Vibration generating motor - Google Patents

Abstract

It enables high reliability and long-term stable feeding (long life) at the connection between the feed terminal and the feed land of the circuit board.

Vibration generating mechanism with weight attached to the rotating shaft,

A housing case for receiving at least a portion of the vibration generating mechanism;

Vibration generation protruding from the housing case and having a pair of feed terminals for supplying electric power to the vibration generating mechanism by contacting and electrically connecting the feed land of the power supply side circuit board mounted in the portable device case. In the electric motor,

Each of the point and the operating point of the feed terminal movable portion that the feed terminal moves in the direction in contact with the feed land is disposed along a plane substantially perpendicular to the axis of rotation of the weight, including the center of vibration movement of the vibration generating motor. A vibration generating motor.

Description

Vibration generating motor {VIBRATION GENERATING MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates mainly to a vibration generating device operating with a silent alarm function mounted on a portable device (including electronic devices such as mobile phones, PHSs, small wireless communication devices, and other portable information communication terminals). Specifically, the present invention relates to a power supply land of a power supply side circuit board in a portable device case body, and a power supply mechanism of the vibration generating motor held on the case body side.

For example, in a quiet public place where people gather, such as an art gallery, a concert hall, or a conference or an important meeting, sudden ringing of a mobile device may cause a lot of trouble to the people around them. For this reason, the silent alarm function using the vibration generating device which notifies an incoming call notification to bodily vibration by vibration is mounted in various portable devices.

This vibration generating device can be roughly divided into two types due to its structure. One is a vibration generating motor using a so-called small motor (hereinafter, simply referred to as a 'vibration motor' as needed), and the other is a speaker drive type sound and buzzer function that reciprocates a magnetic circuit part with a low frequency signal. It is a multifunctional device (hereinafter simply referred to as a 'vibration actuator' if necessary).

In the case of the vibration motor, the weight of the eccentric center or the inclined part is formed on the rotating shaft to be driven, and the eccentric center position of the weight or the like is shaken during the rotation operation of the rotor unit, and the portable centrifugal force such as mobile phones is used. By vibrating a device, as the spread of these various portable devices progresses, the mounting rate and the frequency of use thereof are increasing day by day.

Similarly, in the vibration actuator, in addition to the vibration generating function of the magnetic circuit part due to the low frequency signal, the sounding function of the speech range is also provided, so that the efficiency of the installation space in the flat multifunctional integrated parts can be realized, and the use according to the use can be achieved. This is expanding. In recent years, such as mobile phones and PHSs, which are widely spread and miniaturized, these two types of vibration generating devices are efficiently arranged and mounted in a limited mounting space in the case body.

In these portable devices, the method of feeding power from the power supply side (mainly a circuit board) to the main body of the vibration generating device has been improved day by day. As one of these methods, an elastic press body and a plate spring shape can be used instead of the conventional lead wire soldering or connector connecting method. The structure combining the feed terminal and the structure directly attached to the circuit board by solder are newly examined.

For example, the vibration motor can be mounted in a mobile device main body (hereinafter simply referred to as a device main body) with a relatively small number of steps for assembling work, and also enables the motor main body to directly feed power from the circuit board side. As a method, there is conventionally a feed terminal structure as shown in Fig. 12.

The feed terminal 104 shown in FIG. 12 is arrange | positioned at the terminal block 105 used as an attachment part of the housing case 103 end of the vibration motor 101 which has the weight 106, and one terminal is connected to the terminal 104e. And a part of a strip | belt-shaped which is soldered by the said terminal block 105 from the said terminal block 105 to the contact part 104d, is comprised by the leaf spring bent in the bending part 104b.

By the spring elasticity in the vicinity of the bent portion 104b, the contact portion 104d in the vicinity of the movable portion 104c of the feed terminal 104 is pressed against the feed land 55 of the circuit board 50 formed on the apparatus main body side. Is touching. And as shown to FIG. 12 (B), between the feed terminal 104 and the housing case 103, 130g of elastic pressurizing bodies as a part of the holder 130 which covers the outer periphery of the said housing case 103 are provided. By interposing and combining the case body on the apparatus main body side, the feed terminal 104 is formed by the sum of the interaction between the rubber elastic stress of the convex portion of the elastic pressing body 130g and the leaf spring elastic stress of the feed terminal 104. There exists a method (for example, refer patent documents 1-3) which presses the contact part 104d to the feed land 55.

Patent Document 1 Japanese Unexamined Patent Publication No. 2000-78790

Patent Document 2 Republished Patent WO99 / 23801

Patent Document 3 Japanese Unexamined Patent Publication No. 2001-95200

Moreover, although the shape differs from these leaf spring terminals, it is a feed terminal structure which functions as the same terminal, and twists of the shape as shown in FIG. 15 using the spring elastic wire rod wound, for example. There is a coil spring-shaped feed terminal structure (see Patent Document 4, for example).

Patent Document 4 Japanese Unexamined Patent Publication No. 2002-44904

In addition, a feed terminal structure using a coil spring wound around a spring-elastic wire rod has been designed for a vibration motor.

Patent Document 5 Japanese Patent Application Laid-Open No. 11-136327

However, in the case of the said patent document 4 shown in FIG. 15, like the shape of the feed terminal 104 shown in FIG. 12, for example, the movable part 204c of the feed terminal 204 is mainly the said side of the housing case 203 end side. Since the elastic deformation is performed in the same winding portion 204b as the bent portion 104b of FIG. 12, in the state where the vibration motor 201 is attached on the circuit board of the apparatus main body, the winding portion 204b and the contact portion 204d. Since the distance in the direction of the rotation axis (the distance between the point and the operating point) is long, and there is no mandrel at the center of the winding part 204b in the box of the terminal block 205, the movable part 204c is operated at the time of the vibration function operation ( During the oscillation operation, the stability is weak even between the PQs of the power supply terminals 204, so that the power supply terminal 204 itself swings greatly.

As a result, there are many occurrences of traces of contact wear due to vibration at the contact point with the feed land surface, which causes a problem of poor conduction. The traces of contact wear caused by the vibration may cause black powder due to sparks during energization, which is a serious problem of significantly lowering the connection reliability of the power supply mechanism. In particular, in a vibration motor, the above problems often occur under adverse conditions involving vibration at all times.

On the other hand, the problem of lowering the spring elastic force of the feed terminal is suppressed by the elastic pressing body common to the descriptions of Patent Documents 1 to 3 and is supposed to be compensated for. Basically, however, the feed terminal alone is no different from using a thin plate spring shape having a large dimension from the bent portion to the contact portion, where elastic force is likely to decrease, as described above. There is always a fluctuation in the pressing force in that the sieve is interposed, and this is not a solution to suppress the fluctuation of the feed terminal itself.

The problem to be solved of the conventional feeder terminal structure common to these is that the feed land with the circuit board surface as the ground reference plane and the contact portion of the feeder terminal of the vibration motor in contact therewith can be reliably connected without being adversely affected by vibration. Whether you can For example, as shown in FIGS. 13 and 14, in the case of the vibration motor 101 having the weight 106 attached to the rotating shaft, the eccentric weight 106 is held in the case body side via the holder 130. It is known that both the end portions of the vibration motor 101 rotate around the G (hereinafter, referred to as the vibration operation center point G) shown in the drawing in the circumferential direction in which the weight is rotated. The rocking state of the feed terminal 104 by the oscillation operation at this time was enlarged, respectively, and is shown by the circular figure.

When the contact portion 104d of the power supply terminal 104 is viewed from the upper surface side of FIG. 13 and the front side shown in FIG. 14, the contact portion 104d has a movement amount of the amplitude P7 and the amplitude P8 about the oscillation motion center point G. FIG. Is greatly shaken by In addition, since the elastic pressing body 130g of the holder 130 is elastically deformed at the distance N between the circuit board 50 and the housing case 103 of FIG. 12, the movement contracting even at the amplitude P9 actually occurs. In addition, the total amount of movement due to the swing of the contact portion 104d of the power supply terminal 104 is the sum of P7 + P8 + P9. And the distance L3 between the point F in which the feed terminal 104 shown in FIG. 12 is the bent part 104b, and the action point E which is the contact part 104d adds to the sum total of the said moving amount P7 + P8 + P9, and has a big influence on fluctuation | variation. Gives. That is, the longer the distance L3, the greater the influence on the rigidity of the feed terminal itself, and the contact portion 104d is greatly displaced by the fluctuation, which causes traces of contact wear at the contact points. Finally, there is a problem that adversely affects the feed land on the circuit board side, which causes a poor conduction.

Like this, the example of the vibration motor of a separate model is shown to FIGS. 16-19. 12 to 14, in the vibration motor 101 in which the weight 106 is attached to the rotation shaft, the entire vibration motor 101 is rotated by the rotational operation of the eccentric weight 106. As shown in FIG. About the oscillation center point G shown, both end portions of the shaft rotate in the outer circumferential direction in which the weight is rotated. The rocking state of the power supply terminal 104 by the oscillation operation at this time is shown in a circular drawing in FIG. 17 and FIG.

When the contact portion 104d of the power supply terminal 104 is viewed from the upper side of FIG. 17 and the front side shown in FIG. 18, the amount of movement of the amplitude P10 and the amplitude P11 around the oscillation center point G is determined. Swings more loudly. In addition, since the elastic pressing body 130g of the holder 130 is elastically deformed at the distance N between the circuit board 50 and the housing case 103, a movement contracting at the amplitude P12 is actually added to the feed terminal ( The total amount of movement due to the swing of the contact portion 104d of 104 is the sum of P10 + P11 + P12. The distance L4 between the point F at which the feed terminal 104 shown in FIG. 16 substantially becomes a bent portion and the action point E serving as the contact portion 104d is added to the sum of the movement amounts P10 + P11 + P12, which greatly affects the fluctuation. Gives. That is, the longer the distance L4 affects the stiffness of the feed terminal 104 itself, the contact portion 104d is greatly displaced by the fluctuation, which causes traces of contact wear at the contact point, and finally the circuit board It will adversely affect the feeding land on the side.

12 to 14, the plate spring feed terminal 104 and the elastic pressurizing body 130g extending in the direction of the rotation axis of the weight with respect to the surface of the circuit board 50 are provided. Since it is arranged so as to overlap in the height direction between the housing case 103 of the vibration motor main body, the terminal height (spacing N) is not fixed by the precision of the component on the case body side on which the contact portion 104d is mounted. There are many cases. In other words, in the sandwich state between the case body (not shown) on the apparatus main body side and the internal circuit board 50, the height dimension of the placement space in the case body is different for each case body for setting the vibration motor. There may be a case. This holding state indicates that the pressing force (terminal pressure) of the contact portion 104d always changes with the dimension of the gap N with respect to the feed land 55 surface of the circuit board 50.

In Fig. 19, as an example in that case, variations in the pressing force (hereinafter referred to as terminal pressure, if necessary) of the contact portion 104d with respect to the change in the dimension in the height direction (hereinafter referred to as terminal height if necessary) are shown. Show in graph. As for the terminal height shown in FIG. 19, it is preferable to acquire terminal pressure 0.75N using 6.0 mm as a reference value on a mounting design. However, the terminal height is uneven in the range of plus or minus 0.2 mm due to the tolerance range of the assembled parts, and the terminal pressure at the terminal height of 6.2 to 5.8 mm can be considered substantially. If the terminal height is set to 6.2 mm, when the elastic pressurizer of the prior art is interposed, the terminal pressure may be less than 0.50 N, and there is a fear of a poor conduction at the contact portion or abrasion due to the swinging operation of the feed terminal. On the contrary, in the example of the present invention without the elastic pressurizing body, there is little change and a stable terminal pressure of 0.65N is obtained.

Similarly, when the height of the terminal is set to 5.8 mm, the terminal pressure reaches 2.00 N when the elastic pressurizer according to the prior art is interposed. This time, there is a concern that the marks, deformation, and partial wear due to excessive pressing force at the contact portion are caused. On the contrary, in the example of the present invention without the elastic pressurizer, a stable terminal pressure of 0.85N is obtained with little change. As described above, the power feeding terminal 104 of the conventional vibration motor 101 has a large unevenness and fluctuation of the pressing force according to the elastic deformation state of the elastic pressurizing body 130g, and provides a constant pressing pressure (terminal pressure) at the time of mounting. It is very difficult to maintain.

In particular, in the shape of the holder 130 having the elastic pressing body 130g and the space N portion large, when the vibration motor 101 is held, the entire contact surface of the circuit board 50 surface is elastic in the height direction. The pressing force fluctuates due to the deformation amount and the non-uniformity of the mounting height position, so that the minute contraction action by the vibration is repeated between the circuit board surface and the vibration motor main body. As a result, the feed terminal 104 always changes its contact position with the surface of the circuit board 50, and wear occurs at the contact portion. On the contrary, the whole holder 130 is compressed together with the elastic pressurizer 130g by narrowing the space | interval N of the height direction, and the contact part 104d of the feed terminal 104 is fed to the feed land 55 of the circuit board 50. If it is pushed hard, it is feared that the pressing force with respect to the vertical surface direction of the circuit board 50 will become too high, and also the damage to the feed land 55 will become large.

As described above, the object of the present invention is to provide high reliability and long-term stable feeding, i.e., contact point, of the feed terminal on the side of the vibration motor and the feed land of the circuit board on the apparatus main body to be mounted. An object of the present invention is to provide a feeding mechanism for a vibrating motor that is electrically stable by enabling long life. It is an object of the present invention to make it possible to make both the attachment structure of the vibration motor main body without causing excessive stress or load to the circuit board and the holding structure which reliably transmits vibration to the case body on the portable device side.

In order to achieve the above object, in the invention according to claim 1 of the present invention, a vibration generating mechanism having a weight attached to a rotating shaft, a housing case accommodating at least a part of the vibration generating mechanism, and a portable device protruding from the housing case A vibration generating motor comprising a pair of feed terminals for supplying electric power to the vibration generating mechanism by contacting and electrically connecting a feed land of a power supply side circuit board mounted in a case body. A vibration point characterized in that each of the points and the operating points of the feed terminal movable portion moving in a direction in contact with the feed land are disposed along a plane substantially perpendicular to the rotation axis of the weight, including the center of vibration operation of the vibration generating motor. It is a motor for generation.

Specifically, as shown, for example, in FIG. 1, the point F and the operating point A along the substantially vertical plane M with respect to the rotation axis 2 at a position including the vibration movement center point G of the vibration motor 1. E) is arranged respectively.

In the invention according to claim 2, in the positional relationship between the vibration operation center point of the vibration generating motor and the operating point of the feed terminal movable part disposed along a plane direction substantially perpendicular to the rotation axis of the weight including the vibration operation center point. And when the vibration generating motor is mounted on the circuit board in the case of the portable device, the movement direction of the operating point of the feed terminal movable portion which is brought into contact with the feed land is close to the center of the vibration operation. The vibration generating motor according to claim 1 is used.

Specifically, for example, as shown in Figs. 1, 3, and 9, the working point E located at the tip end of the feed terminal 4 is pressed by the feed land of the circuit board to be mounted. It is arrange | positioned so that it may move to the direction shown by the arrow, ie, the direction approaching the vibration center point G. In addition, contrary to the above figure, even when the operating point E is located outside the point F, and the feed terminal 4 is in the opposite direction to the arrow, the vibrating operation is performed even when each other is opened to the outside. The layout is closer to the center point.

In the invention according to claim 3, the positional relationship between the oscillation center point of the vibration generating motor and the operating point of the feed terminal movable part, which is arranged along the plane direction substantially perpendicular to the rotation axis of the weight, including the vibration center point. When the vibration generating motor is mounted on a circuit board in a portable device case body, the moving direction of the operating point of the feed terminal movable portion which is operated in contact with the feed land is approximately perpendicular or approximately arc-shaped with respect to the feed land surface. The vibration generating motor according to claim 1 or 2, wherein the motor is disposed in a movable state.

Specifically, for example, the movement direction of the action point F shown in Figs. 1, 3, and 9 is arranged in a state in which the movement direction F can be moved substantially perpendicularly or substantially in an arc shape with respect to the feed land surface. For example, when the movement amount is small, the movement is substantially vertical. When the movement amount or the moving angle is large, the movement is substantially on the arc.

Further, in the invention according to claim 4, in the positional relationship between the point and the operating point of the feed terminal movable portion formed along a plane direction substantially perpendicular to the rotation axis of the weight including the vibration movement center point of the vibration generating motor, the vibration When the generator motor is mounted on the circuit board in the portable device case body, an operating point of the feed terminal movable portion is disposed inside the position closer to the repair line drawn on the circuit board from the oscillation center point. The vibration generating motor according to claims 1 to 3 is used.

Specifically, as shown, for example, in FIG. 4, with respect to the repair line Y drawn on the circuit board from the oscillation center point G, the operating point E of the feed terminal movable portion is repaired from the position of the point F. It is an arrangement close to the (Y) side.

Further, in the invention according to claim 5, the position of the point and the operating point of the feed terminal movable part arranged along the plane direction substantially perpendicular to the rotation axis of the weight, including the vibration operation center point of the vibration generating motor and the vibration operation center point. In the relation, when the vibration generating motor is mounted on the circuit board in the portable device case, the point and the operating point of the feed terminal movable portion are the vibration movement center point with respect to the repair drawn on the circuit board from the vibration operation center point. The vibration generating motor according to Claims 1 to 4, which is arranged within an angle range of about 45 degrees on one side and about 90 degrees on both sides of the circuit board surface direction.

Specifically, as shown in FIG. 4, the said point F and the action point E are arrange | positioned within the angle range W enclosed by the triangle shown by the vibration movement center point G in the circuit board surface direction.

In the invention according to claim 6, a ring-shaped contact point is formed at the tip of the movable part of the power supply terminal, and a contact portion with a power supply land is disposed on a part of the outer circumference of the contact point circle. It is a motor for vibration generation.

Specifically, for example, as shown in Figs. 1 to 4, a ring-shaped contact point is formed at the tip of the feed terminal movable portion and disposed so as to be external to the feed land surface of the circuit board.

Moreover, in invention of Claim 7, the ring-shaped contact point wound by the front-end | tip of the movable part of the said power supply terminal is formed, and the multi-contact part with a power supply land is arrange | positioned at a part of said contact part circular outer periphery, Claim 1 characterized by the above-mentioned. The vibration generating motor according to Claim 5 is used.

Specifically, for example, as shown in Fig. 1, Fig. 2 and Fig. 5, the ring-shaped contact points are formed in a plurality of coils, and the ring-shaped contact portions are arranged so as to circumscribe at multiple contacts with respect to the feed land of the circuit board. will be.

And in the invention of Claim 8, the arrangement direction of the contact point circular outer periphery of the front-end | tip of the movable part of the said feed terminal is arrange | positioned along the surface direction substantially perpendicular to the rotation axis of a weight, The description of Claim 6 or 7 characterized by the above-mentioned. It is a motor for vibration generation.

Specifically, for example, as shown in Figs. 1, 2, and 5, the arrangement direction of the contact point circular outer circumference of the feed terminal movable portion tip is substantially perpendicular to the rotation axis of the weight in the same manner as the movable direction. Will be placed along.

In the invention described in claim 9, the feed terminal is formed of an elastic spring member made of a wire rod, and the vibration generating motor according to claims 1 to 8 is characterized by the above-mentioned.

Specifically, for example, as shown in Figs. 1 to 11, the pair of feed terminals is molded from an elastic spring member made of a wire rod.

In the invention according to claim 10, at least a part of the terminal block for holding the feed terminal is located in the center of the cylinder side surface outer side of the housing case, and has a terminal block shape having a terminal block plane portion having one flat surface parallel to the rotation axis of the weight, By the terminal block flat portion, the circuit board surface and the terminal block flat portion are maintained when the positions of the housing case and the circuit board surface are maintained at regular intervals and the vibration generating motor is mounted on the circuit board in the portable device case body. The motor for vibration generation according to claims 1 to 9, wherein the feed terminal contact portion is brought into direct contact with each other and is electrically connected on the same plane as that of the terminal block plane portion at the feed land position of the circuit board. Doing.

Specifically, for example, as shown in Figs. 4, 7, and 9, the circuit board surface and the terminal block planar portion directly face each other without placing anything between the two surfaces, and at the same time, the feed terminal contact portion contacts the circuit. It is electrically connected on the same plane as the terminal block plane portion at the feed land position of the substrate.

In the invention described in claim 11, a part of the feed terminal is wound around the core portion formed in the terminal block and held. The vibration generating motor according to claims 1 to 10 is characterized by the above-mentioned.

Specifically, as shown in FIG. 2, for example, as shown in FIG. 2, the power supply terminal has a winding portion 4b in which a portion of the terminal block 5 is twisted and deformed so as to wind the winding portion 5d protruding in the axial direction of the rotation shaft 2. There is one formed in part of (4).

In the invention according to claim 12, there is provided a holder for holding the vibration generating motor in a portable device case, and when the vibration generating motor is mounted on a circuit board in the portable device case, The ground plane part which contacts the circuit board surface of the holder shape which covers the housing case of an electric motor is located in the both sides of the rotation axis direction of a weight with respect to the terminal block plane part of the said vibration generating motor, and the ground of the said terminal block plane part and the holder The planar part is arrange | positioned on substantially the same plane, The vibration generation electric motor of Claims 1-11 characterized by the above-mentioned.

Specifically, as shown in FIG. 7, for example, the ground plane part which contact | connects the said circuit board surface of the holder shape which covers the housing case of a vibration generating motor centering on a terminal block plane part center is a terminal block plane of the said vibration generating motor. Located on both sides of the rotation axis direction of the weight with respect to the part, the terminal plane plane portion and the ground plane portion of the holder are disposed on substantially the same plane.

In the invention according to claim 13, the vibration generating motor is mounted on a circuit board in the portable device case, and is provided with the vibration generating motor according to claims 1 to 12. A portable device characterized in that the feed land and the feed terminal of the vibration generating motor are electrically connected by contacting with the elastic force by the assembling operation of mounting the device case body.

1 is a schematic perspective view showing a feeding terminal arrangement direction of a vibration motor according to a first embodiment.

Fig. 2 is a three side view showing the whole vibration motor according to the first embodiment.

Fig. 3 is a schematic diagram showing the relative positional relationship between the power feeding terminal movable direction and the circuit board of the vibration motor according to the first embodiment.

Fig. 4 is a schematic diagram showing the relative positional relationship between the vibration operation center point, the feed terminal movable part point and the operating point, and the circuit board of the vibration motor according to the first embodiment.

5 is a schematic view and an enlarged view of a contact point when the vibration operation of the vibration motor according to the first embodiment is viewed from an upper surface side.

6 is a schematic view and an enlarged view of a contact point when the vibration operation of the vibration motor according to the first embodiment is seen from the front side.

Fig. 7 is a schematic view of the vibration operation state of the holder mounting vibration motor according to the first embodiment when viewed from the front side;

Fig. 8 is a three side view showing the whole vibration motor according to the second embodiment.

Fig. 9 is a schematic diagram showing a relative positional relationship between a power feeding terminal movable direction and a circuit board of the vibration motor according to the second embodiment.

10 is a schematic view and an enlarged view of a contact point when the vibration operation of the vibration motor according to the second embodiment is viewed from an upper surface side.

11 is a schematic view and an enlarged view of a contact point when the vibration operation of the vibration motor according to the second embodiment is seen from the front side.

12 is a three side view showing an entire vibration motor of a conventional feed terminal structure;

Fig. 13 is a schematic view and an enlarged view of a contact point when a vibration operation of a vibration motor of a conventional feed terminal structure is seen from an upper surface side;

Fig. 14 is a schematic view and an enlarged view of a contact point when a vibration operation of a vibration motor of a conventional feed terminal structure is seen from the front side;

15 is a schematic perspective view showing a vibration motor of a conventional feed terminal structure.

Fig. 16 is a three side view showing the whole vibration motor of a conventional feed terminal structure;

Fig. 17 is a schematic view and an enlarged view of a contact point when a vibration operation of a vibration motor of a conventional feed terminal structure is seen from an upper surface side;

18 is a schematic view and an enlarged view of a contact point when a vibration operation of a vibration motor of a conventional feed terminal structure is seen from the front side;

19 is a schematic diagram of a graph comparing the terminal pressure of a conventional feed terminal structure and a feed terminal structure of the present invention;

* Explanation of symbols for the main parts of the drawings *

1, 101, 201: vibration motor 2: rotating shaft

3, 103, 203: housing case 4, 104, 204: feed terminal

4b, 204b: winding part 104b: bending part

4c, 104c, 204c: Movable part 4d, 104d, 204d: Contact part

4e, 104e: connection part 4f: torsion part

5, 105, 205: terminal block 5b: recess

5c: flat part 5d: core part

6, 106, 206: Weight 7: Magnet

8: Winding coil 9: Bearing

10: rectifier mechanism part 11: terminal

30, 130: holder 30g, 130g: elastic press

50: circuit board 55: feed land

E: point of action F: point

G: center of vibration motion H: ridge

N: Spacing P: Contact Position

T: Width of terminal block flat part W: Angle range

<1st embodiment>

EMBODIMENT OF THE INVENTION Hereinafter, the structure of 1st Embodiment which concerns on this invention is demonstrated, referring FIGS. In this first embodiment, a coreless cylindrical vibration motor having an eccentric weight on a rotating shaft will be described as an example of a vibration generating motor.

An example of the best embodiment of this invention is shown in FIG. As shown in Fig. 1, the vibration motor 1 of the present invention has each of the point F and the operating point E of the movable portion 4c of the feed terminal 4, which move in the direction in contact with the feed land side, the vibration. It has the feed terminal structure arrange | positioned along the substantially vertical surface M (XY plane) with respect to the rotating shaft 2 of the said weight 6 including the oscillation center point G of the motor 1.

2B is a schematic cross-sectional view of the inside of the coreless motor. The vibration motor 1 has an inner portion of the housing case 3 in which an eccentric weight 6 is fixed to one end of the rotating shaft 2 and the rotor portion for driving the rotating shaft 2 is supported by the bearing 9. It is arrange | positioned at the storage. The driving mechanism of the motor is divided into a terminal block 5, a bearing 9, a magnet 7, which hold the housing case 3 and the feed terminal 4 on the stator side, and a rotating shaft (on the rotor side) on the other hand. 2) It is outlined by arrange | positioning the winding coil 8 and the electric commutation mechanism part 10 required for the rotation drive which connects the said rotating shaft 2 and the winding coil 8 integrally. Due to the rotational operation of the rotor part, the weight 6 swings and generates a vibration force.

This motor structure fixes the cylindrical magnet 7 at its center at one end side of the housing case 3 at the small diameter end formed in the drawing and at the open end side with a bearing 9 and a power feeding mechanism part. The terminal block 5 which consists of is provided. The terminal block 5 is formed of a resin material or other insulating material, is formed on the opening side of the housing case 3, and is located on the cylindrical outer circumferential surface of the housing case 3 from the fitting position with the bearing 9. It is formed to follow. This motor structure is somewhat different from the terminal block arrangement of a general cylindrical coreless motor.

As shown in FIG. 2, the feed terminal 4 is made of a conductive rod-shaped member having spring elasticity, and the core portion 5d of the terminal block 5 protruding in the longitudinal direction of the rotation shaft 2; Part) has a winding part (part 4b) twisted and deformed so as to wind the part), and as shown in Fig. 2C, one end thereof extends outward in the circumferential direction centering on the winding part 4b. The bent ring feed terminal contact portion 4d is formed. And the opposite end from the said winding part 4b of the feed terminal 4 is soldered to the brush piece of the commutation mechanism part 10 inside the motor main body, and the terminal 11 which energized, as shown to FIG. 2 (A). And the like are electrically connected at the connecting portion 4e.

In addition, the feed terminal 4 is formed of a copper alloy such as phosphor bronze, beryllium copper or silver silver, or a rod-like member made of iron alloy such as SUS or SWP, which has spring elasticity and also has conductive properties. desirable. A part of the rod-shaped member is wound by the winding portion 4b and twisted to have a spring elastic force, resulting in a torsion coil spring structure as shown in each drawing.

The specific spring elastic force can be designed based on the material of the rod-shaped member, the diameter of the rod, the number of turns of the winding part 4b, the moving angle of the movable part 4c of the feed terminal, and the like. have. The value of this elastic force was the value which satisfies more than enough even if compared with the conditions by the combination of the conventional normal leaf spring terminal and the elastic pressing body shown in said FIG. This value does not necessarily mean that the pressing force of the feed terminal contact portion on the circuit board side is simply stronger, and most preferably, it can be maintained without changing a constant value at an appropriate pressing force (see Fig. 19).

In the operation surface, as shown by the broken line and the arrow of FIG. 3A, it has elastic deformation along the direction (M plane of FIG. 1) substantially perpendicular to the circumferential center of the said core part 5d. The movable part 4c of the feed terminal 4 is formed in the state which can move on a circular arc. As for the movable part 4c, the part which protrudes outward from the planar part 5c of the terminal block 5 is pressed against the feeding land 55 of the circuit board 50, as shown to FIG. 3 (B). It is stored in the recessed part 5b (refer FIG. 2) of the terminal block 5, having elastic force. As a result, the planar portion 5c of the terminal block 5 is held in contact with the substrate plane of the circuit board 50 (position of the feed land 55).

As a more specific example, Fig. 7 shows a state when the holder 30 which actually covers the vibration motor body exterior is attached and combined with the circuit board 50 in the device case body. In the state where the contact portion 4d of the feed terminal is accommodated in the recess 5b of the terminal block 5, the flat portion 5c of the terminal block 5 faces directly the circuit board 50, and again the holder ( The vibration motor 1 is held in contact with the circuit board 50 at the bottom of the bottom surface 30. The contact position where the contact portion 4d in contact with the power supply land of the circuit board 50 is indicated by the symbol P at the same time. The vibration motor 1 swings about the vibration movement center point G. FIG. For this reason, the force of Q1 and Q2 shown in the figure acts on the left and right in the direction of both rotation axes centering on the width T of the terminal block plane portion 5c near the contact position P in FIG. 7. However, even in this case, since the contact point P is located at the center of rotation without being affected by the movement of Q1 and Q2, the positional relationship with the circuit board 50 hardly moves and always stably contacts the feed land side. Can be.

At this time, as shown in (B) of FIG. 3, the action point E from the distance of the said winding part 4b and the ring-shaped feed terminal contact part 4d, ie, the point F of the feed terminal movable part 4c. The distance to is extremely short compared with the conventional leaf spring terminal structure shown in FIG. 12B, and the direction extending from the point F of the feed terminal movable part 4c to the working point E is the conventional leaf spring. It is 90 degrees different from the terminal structure.

The vibration motor 1 is shaken by the rotational movement of the eccentric weight 6 originally attached to the rotation shaft 2, and swings as shown in FIGS. 5 to 7. In other words, by the rotation operation, the entire vibration motor 1 swings around the vibration operation center point G shown above in the circumferential direction in which the center weight rotates. The rocking state of the feed terminal by the oscillation operation at this time is shown in a circular drawing, enlarged in Figs.

When the contact portion 4d of the power supply terminal 4 is viewed from the upper surface side of FIG. 5 and the front side shown in FIG. 6, the contact portion 4d is formed by the amount of movement of the amplitude P1 and the amplitude P2 around the oscillation center point G. As shown in FIG. By shaking a little. However, since the distance between the circuit board 50 and the housing case 3 is kept constant by the flat portion 5c of the terminal block 5 as described above, in practice, the amplitude P3 of the contact position P In this case, there is no movement amount, and the total movement amount due to the swing of the contact portion 4d is the sum of only P1 + P2. And the distance L1 of the point F in the vicinity of the winding part 4b of the feed terminal 4 shown in FIG. 3, and the action point E which is the contact part 4d is short, and the action point E vibrates By being approached by the center point G, the feed terminal itself also influences the rigidity and the followability to the swing, so that the displacement of the contact portion 4d due to the swing is minimized, and the feed land which causes traces of contact wear is suppressed. The adverse effect is eliminated and it does not cause a malfunction.

In other words, since the acting points E are arranged close to each other by the oscillation center point G, the movable directions are arranged together along a plane substantially perpendicular to the rotation axis including the oscillation center point G. The impact is minimal. In addition, since the spring elasticity of the feed terminal itself is sufficiently obtained by the winding portion 4b, the contact portion 4d is always in a state where the terminal block flat portion 5c is directly in contact with the feed land of the circuit board. It is possible to connect with a constant pressing force. As a result, the contact portion 4d is not displaced in the spring elastic direction (thickness direction of the circuit board) by swinging, and the sliding movement that causes traces of contact wear is suppressed, so that the feed land on the circuit board side is finally No adverse effect on

As shown in Fig. 4, when the vibration motor 1 is mounted on the circuit board 50 in the case body, the point F and the operating point E of the movable portion 4c of the feed terminal 4 are shown. ) With respect to the repair line Y drawn on the circuit board from the oscillation center point G, from the oscillation center point G to the surface direction of the circuit board 50 about 45 degrees on one side and about 90 degrees on both sides of the pair. By arrange | positioning in the angle range W of FIG., The power supply terminal structure containing the terminal block 5 can be arrange | positioned compactly and space efficient.

In the pair of feed terminals 4, a ring-shaped contact point is formed at the tip of the movable portion 4c, and a contact portion 4d with a feed land is disposed on a part of the circular outer circumference of the contact point. It is a structure in contact with a feed land in a multi-contact state by a ring-shaped contact point. As can also be seen from FIG. 1, the arrangement direction of the contact portion circular outer circumference of the front end of the movable portion 4c of the feed terminal 4 is along a plane direction substantially perpendicular to the rotation axis 2 of the weight 6. By arrange | positioning, the contact with a feed land is made into the ring-shaped large arc direction, and it is set as the shape which suppresses generation | occurrence | production of a contact wear trace.

In this way, the contact portion 4d operates at a short distance from the point F position of the wound portion 4b, and contacts the feed land 55 on the circuit board side in a multi-contact state, and the movable portion 4c is moved. Since it is maintained at a constant terminal pressure while being kept in the narrow space of the recessed part 5b, even if a strong shock is applied from the outside such as vibration accompanying the driving operation of the vibration motor 1 or falling impact of the main body of the device, The reliability and stability of the power feeding operation at the contact portion 4d with the land 55 can always be obtained.

<2nd embodiment>

Next, 2nd Embodiment of this invention is described, referring FIGS. In addition, the same code | symbol is attached | subjected to the same place as 1st Embodiment, and the overlapping description is abbreviate | omitted or simplified, and it describes.

The difference from the first embodiment is that the torsion coil-shaped feed terminal centered on the winding portion has a torsion spring shape, and the tip of the movable portion of the feed terminal is not a ring but a contact shape bent in a V shape. The point and coreless motor internal structure are different. The provisional structure in which a pair of feed terminals fall in an inward direction facing each other is the same as above.

That is, in 2nd Embodiment, the said pair of feed terminals is made into the torsion spring which torsionally deforms a part of straight line of the longitudinal direction of the electroconductive rod-shaped member which has a spring property. Further, the contact portion in contact with the feed land of the feed terminal is located near the tip portion which is bent and extended outward in the circumferential direction centering on a part of the straight line in the axial longitudinal direction of the rod-shaped shape, and is approximately at the center position of the vibration center point. The movable part and the contact part of the feed terminal are arrange | positioned as shown to FIG. 8, 9 in the state which has elastic deformation along a perpendicular surface direction, and is movable on an arc.

The feed terminal 4 shown in FIG. 8 is a V-shaped shape which positioned the contact part 4d at the front-end | tip, and is a structure which arrange | positioned the torsion part 4f in the linear part of both sides. The feeder terminal structure which is simpler, more compact, and has no risk of contact between plus and minus poles facilitates assembly at the time of mass production and energization stability at the time of mounting.

8 is a structural design that minimizes the height dimension in the vertical direction on the circuit board surface when the vibration motor 1 is mounted. For example, the space | interval N of the outer dimension of the housing case 3 shown in the said FIG. 8 in the said 2nd embodiment, and the height dimension of the terminal block flat part 5c is the space | interval of the conventional height dimension shown in FIG. As can be seen from the comparison with (N), space saving is realized. Thereby, the height dimension of the whole vibration motor can be suppressed to the minimum.

In the recessed portion 5b, an inclined surface that is apexed from the ridgeline H is formed, and when mounted on the circuit board 50, (+) and (-) of the pair of feed terminals 4 operate. Even if each movable part 4c fell inward, the contact part 4d stops and accommodates in the position which abuts on the inclined surface. As a result, the mounting efficiency on the surface of the circuit board 50 can be minimized, that is, the gap (N) value of the height dimension can be minimized, and the elastic pressing force on the feed land portion is fixed without being influenced by the outside during the swing. It is possible to keep it.

Operationally, as shown by the broken line and arrow of FIG. 9 (A), it can move to a circular arc with elastic deformation along the substantially perpendicular surface direction centering on the straight line of the longitudinal direction of the torsionally deformed rod-shaped member. In the state, the movable part 4c of the feed terminal 4 is formed. As for the movable part 4c, the part which protrudes outward from the planar part 5c of the terminal block 5 is pressed against the feeding land 55 of the circuit board 50, as shown to FIG. 9 (B). It is stored in the recessed part 5b of the terminal block 5, having elastic force. As a result, the planar portion 5c of the terminal block 5 is held in contact with the substrate plane of the circuit board 50 (position of the feed land 55).

Further, the vibration motor 1 is shaken by the rotational movement of the eccentric weight 6 originally attached to the rotation shaft 2, and swings as shown in FIGS. 10 and 11. In other words, by the rotation operation, the entire vibration motor 1 swings around the center of rotation of the vibration motion G as described above in the circumferential direction in which the weight is rotated. The swinging state of the feed terminal by vibrating operation at this time is shown in a circular drawing in FIG. 10 and FIG.

The contact portion 4d of the power feeding terminal 4 is connected to the amount of movement of the amplitude P4 and the amplitude P5 about the oscillation center point G when viewed from the upper surface side of FIG. 10 and the front side shown in FIG. By shaking a little. However, since the distance between the circuit board 50 and the housing case 3 is kept constant by the terminal block flat portion 5c as described above, there is practically no movement amount at the amplitude P6, so that the feed terminal 4 The total amount of movement due to the swing of the contact portion 4d of the summation is the sum of only P4 + P5. And the distance L2 of the point F of the feed terminal 4 shown to FIG. 9B, and the acting point E which is the contact part 4d is short, and the acting point E becomes a vibration center point more ( By approaching G), the sum total of the total amount of movement P4 + P5 becomes small, and also affects the rigidity of the feed terminal itself and the followability to swing, and the displacement caused by the swing of the contact portion 4d is minimized. Therefore, the adverse effect on the feed land that causes traces of contact wear is eliminated and there is no cause of poor conduction.

In other words, since the acting points E are arranged close to each other by the oscillation center point G, the movable directions are arranged together along a plane substantially perpendicular to the rotation axis including the oscillation center point G. The impact is minimal. In addition, since the spring elasticity of the feed terminal itself is sufficiently obtained by the torsion portion 4f, the contact portion 4d is always in a state in which the terminal block flat portion 5c is directly in contact with the feed land of the circuit board. It is possible to connect with a constant pressing force. As a result, the contact portion 4d is not displaced in the spring elastic direction (thickness direction of the circuit board) by swinging, and the sliding movement that causes traces of contact wear is suppressed, so that the feed land on the circuit board side is finally No adverse effect on

And similarly to the arrangement shown in Fig. 4, when the vibration motor 1 is mounted on the circuit board 50 in the case of the portable device, the point F and the operating point E of the feed terminal movable portion 4c are the same. Angle range of about 45 degrees on one side and about 90 degrees on both sides pair with respect to the water line Y drawn on the circuit board from the oscillation center point G on the circuit board 50 at the oscillation center point G. Since it is arrange | positioned inside, the feed terminal structure containing a terminal block can be arrange | positioned more compactly and space efficient.

In addition, the present invention can be variously modified based on the technical idea of the various embodiments described herein, and the vibration generating mechanism can be applied to various electric motors having a rotating shaft as well as the cylindrical coreless motor of the present embodiment. Of course it can. In addition, if the holder is insulative, it is not necessarily an elastic material, and if it is possible to maintain the arrangement relationship between the circuit board and the terminal block flat portion, there is no need to mount it on the vibration motor side.

As described above, according to the present invention, in the connection state between the feed terminal of the vibration motor and the circuit board feed land on the side of the equipment main body to be mounted, it is a source of high reliability and long-term stable feeding, i.e., wear of contact points due to vibration. In this way, the life of the feeder terminal can be realized. As a result, a durable vibration motor that is electrically stable in operation as compared with the prior art is obtained, and the connection structure of the feed terminal that does not generate excessive stress or load on the circuit board and the feed land, and reliably A vibration motor is obtained which is compatible with a holding structure for transmitting the generated vibrations.

That is, an elastic force is applied to a vibration generating mechanism having a weight attached to a rotating shaft, a housing case accommodating at least a part of the vibration generating mechanism, and a power supply land of a power supply side circuit board protruding from the housing case and mounted in the portable device case body. A vibration motor including a pair of feed terminals that are brought into contact with each other and electrically connected to each other to supply power to the vibration generating mechanism, each of the points and the operating points of the feed terminal movable portion, wherein the feed terminal moves in a direction in contact with the feed land; By being disposed along a plane substantially perpendicular to the rotation axis of the weight, including the vibration center point of the vibration motor, a feed terminal structure is hardly affected by the vibration motion generated in the vibration motor body.

Substantially, compared with the general amount of movement of the contact portion of the feed terminal by the conventional leaf spring, the value is suppressed to 1/4 to 1/10 or less of the conventional.

Moreover, in the said feed terminal, the distance from the point (bending part) which acquires a spring elastic force to the working point (contact point) becomes short, and a torsion torque can be easily produced by a winding part, and only the spring elastic force which a feed terminal itself has is sufficient. Pressurized connection becomes possible. Therefore, the electricity supply reliability in the feed terminal contact part at the time of mounting connection improves.

Therefore, the reliability of the mounting on the circuit board surface of the vibration motor can be improved and the elastic pressing force on the feed land can be kept constant, so that the contact between the feed land and the feed terminal contact portion can be made stable. .

Moreover, the portable terminal device which is excellent in reliability is obtained by mounting the vibration motor which has the effect by these inventions mentioned above.

Multi-functional mobile phones including mobile phones with vibration function, mobile communication devices such as wristwatch type PHS, small wireless communication premises, various information communication terminal devices such as portable PDAs, and game controllers with bodily vibration It is installed in general electronic devices including electronic toys such as pocket game machines.

Claims (13)

Vibration generating mechanism with weight attached to the rotating shaft, A housing case for accommodating part or all of the vibration generating mechanism, and Vibration generation protruding from the housing case and having a pair of feed terminals for supplying electric power to the vibration generating mechanism by contacting and electrically connecting the feed land of the power supply side circuit board mounted in the portable device case. In the electric motor, Each of the feed point and the operating point of the feed terminal movable portion that moves in the direction in contact with the feed land of the feed terminal is disposed along a plane perpendicular to the axis of rotation of the weight, including the center of vibration operation of the vibration generating motor. Electric motor for vibration generation. The method of claim 1, In the positional relationship between the vibration operation center point of the vibration generating motor and the operating point of the feed terminal movable portion disposed along the plane direction perpendicular to the rotation axis of the weight including the vibration operation center point, When the vibration generating motor is mounted on a circuit board in the case of the portable device, the vibration is characterized in that the movement direction of the operating point of the power supply terminal movable portion that is in contact with the power supply land moves closer to the center of the vibration operation Generation motor. The method according to claim 1 or 2, In the positional relationship between the vibration operation center point of the vibration generating motor and the operating point of the feed terminal movable portion disposed along the plane direction perpendicular to the rotation axis of the weight including the vibration operation center point, When the vibration generating motor is mounted on a circuit board in the case of a portable device, a state in which a movement direction of an operating point of the feed terminal movable portion that moves in contact with a feed land may be moved vertically or circularly with respect to the feed land surface. Vibration generating motor, characterized in that arranged in. The method according to claim 1 or 2, In the positional relationship between the point and the operating point of the feed terminal movable portion formed along the plane direction perpendicular to the rotation axis of the weight, including the center of vibration operation of the vibration generating motor, When the vibration generating motor is mounted on the circuit board in the case of the portable device, the operating point of the feed terminal movable part is disposed inside the position closer to the repair line drawn on the circuit board from the vibration center point. Electric motor for vibration generation. The method according to claim 1 or 2, In the positional relationship between the vibration operation center point of the vibration generating motor and the feed terminal movable part disposed along the plane direction perpendicular to the rotation axis of the weight including the vibration operation center point, When the vibration generating motor is mounted on the circuit board in the case of the portable device, the point and the operating point of the feed terminal movable portion are drawn from the vibration operation center point to the repair surface drawn on the circuit board from the vibration operation center point. A vibration generating motor, characterized in that it is disposed within an angle range of about 45 degrees on one side and about 90 degrees on both sides of the pair. The method according to claim 1 or 2, A ring-shaped contact point is formed at the front end of the movable part of the feed terminal, and a contact portion with a feed land is disposed at a portion of the outer circumference of the contact point circle. The method according to claim 1 or 2, A ring-shaped contact point wound at the tip of the movable part of the feed terminal is formed, and a multi-contact portion with a feed land is disposed on a part of the outer circumference of the contact point circle. The method of claim 6, An arrangement direction of a contact portion circular outer circumference of the front end of the movable part of the feed terminal is arranged along a plane direction perpendicular to the rotation axis of the weight. The method according to claim 1 or 2, And said feed terminal is formed of an elastic spring member made of a wire rod. The method according to claim 1 or 2, A part or all of the terminal block holding the said feed terminal is a terminal block shape which is located in the center of the outer side of the cylinder side surface of a housing case, and has a terminal block flat part in which one plane was formed in parallel with the rotation axis of a weight, The said terminal block planar part makes the said When the position of the housing case and the circuit board surface is maintained at regular intervals, and the vibration generating motor is mounted on the circuit board in the portable device case body, the circuit board surface and the terminal block plane portion directly face to face and at the same time, And a feed terminal contact portion is electrically connected on the same plane as the terminal block plane portion at a feed land position of the circuit board. The method according to claim 1 or 2, And a portion of the feed terminal is wound around the winding core formed on the terminal block and held. The method according to claim 1 or 2, And a holder for holding the vibration generating motor in a portable device case, and when the vibration generating motor is mounted on a circuit board in the portable device case, a holder shape covering the housing case of the vibration generating motor. The ground plane portion in contact with the circuit board surface is located on both sides of the rotation axis direction of the weight with respect to the terminal block plane portion of the vibration generating motor, and the ground plane portion of the terminal block plane portion and the holder are disposed on the same plane. A vibration generating motor, characterized in that. A portable device comprising the vibration generating motor according to claim 1 or 2, wherein the vibration generating motor is mounted on a circuit board in the portable device case, and the feed land of the circuit board and the vibration generation are provided. A portable device comprising a configuration in which a feed terminal of an electric motor is electrically connected by contacting with an elastic force by an assembling operation for mounting the device case body.

Images